linux-kernel - Re: 回复: [v3] riscv: dts: starfive: jh7110: Add camera subsystem nodes

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Message-ID: <Zw1-vcN4CoVkfLjU@aurel32.net>
Date: Mon, 14 Oct 2024 22:27:41 +0200
From: Aurelien Jarno <aurelien@...el32.net>
To: Changhuang Liang <changhuang.liang@...rfivetech.com>
Cc: Conor Dooley <conor+dt@...nel.org>,
	Jack Zhu <jack.zhu@...rfivetech.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-riscv@...ts.infradead.org" <linux-riscv@...ts.infradead.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	E Shattow <lucent@...il.com>
Subject: Re: 回复: [v3] riscv: dts:
 starfive: jh7110: Add camera subsystem nodes

Hi,

On 2024-10-14 01:08, Changhuang Liang wrote:
> Hi, Aurelien
> 
> > 
> > Hi,
> > 
> > On 2024-02-18 19:27, Changhuang Liang wrote:
> > > Add camera subsystem nodes for the StarFive JH7110 SoC. They contain
> > > the dphy-rx, csi2rx, camss nodes.
> > >
> > > Signed-off-by: Changhuang Liang <changhuang.liang@...rfivetech.com>
> > > ---
> > >  .../jh7110-starfive-visionfive-2.dtsi         | 49 ++++++++++++++
> > >  arch/riscv/boot/dts/starfive/jh7110.dtsi      | 67
> > +++++++++++++++++++
> > >  2 files changed, 116 insertions(+)
> > 
> > We have been asked to enable CONFIG_VIDEO_STARFIVE_CAMSS in the
> > Debian kernel, which from my understanding and given the device tree shown
> > below also requires enabling CONFIG_VIDEO_CADENCE_CSI2RX. That said
> > doing so triggers the following error in dmesg:
> > 
> > [   25.143282] cdns-csi2rx 19800000.csi: probe with driver cdns-csi2rx
> > failed with error -22
> > 
> > From a quick look it seems there is something in the port@0 csi2rx entry. Do
> > you happen to know what is wrong?
> > 
> 
> You need to add your sensor node. You can refer to this patch:
> https://patchwork.kernel.org/project/linux-riscv/patch/20240119100639.84029-3-changhuang.liang@starfivetech.com/
> 
> We suggest that using the imx219

Thanks for your answer. I do not have any sensor attached, the goal is
to build a generic kernel, and people can use overlays or patch their
device tree to add support for additional devices.

In that regard, I have the impression that csi2rx device (and maybe the
camss device?) should not be marked as enabled in the default device
tree. I think they could be enabled by users as part of the change need
to add the sensor node.

Regards
Aurelien

-- 
Aurelien Jarno                          GPG: 4096R/1DDD8C9B
aurelien@...el32.net                     http://aurel32.net